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Texas Instruments CD74ACT08M
- Part No.:
- CD74ACT08M
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74ACT08M.pdf
- Description:
- IC GATE AND 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,145
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Product details
Overview
CD74ACT08M from Texas Instruments is a quadruple 2-input positive-AND gate logic IC performing Y = A • B in positive logic, with ±24mA output drive, TTL-voltage-compatible inputs, and balanced propagation delays of 3.3–12.9ns (VCC = 5V, CL = 50pF). It operates across −55°C to +125°C and is used in industrial control signal conditioning and digital bus interfacing.
For engineers reviewing the CD74ACT08M datasheet, CD74ACT08M pinout, CD74ACT08M application, or CD74ACT08M equivalent, this page delivers verified package mapping (SOIC-14), true switching characteristics, ESD robustness (±2kV HBM), supply voltage range (4.5–5.5V), and functional compatibility within the CDx4ACT08 family.
Technical Context
The CD74ACT08M implements four independent AND gates in a single SOIC-14 package, each with buffered TTL-compatible inputs and CMOS outputs. Its SCR-latchup-resistant process ensures reliability in noisy environments, while its 50pF power-dissipation capacitance supports stable operation at up to 100MHz toggle rates under load.
It requires no external enable logic and functions with rail-to-rail input voltage compliance (0–VCC) and defined VIH/VIL thresholds (2.0V/0.8V at VCC = 4.5–5.5V). All unused inputs must be tied to VCC or GND to prevent floating states and unintended current draw.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quadruple 2-input AND (Y = A • B per gate, positive logic) |
| Supply Voltage | 4.5V to 5.5V - ensures compatibility with standard 5V TTL/CMOS systems without level-shifting |
| Output Drive | ±24mA - supports fanout to 15 F-series devices and direct driving of 50Ω transmission lines |
| Propagation Delay | 3.3ns (min) to 12.9ns (max) - enables reliable timing in high-speed combinatorial logic paths |
| Input Compatibility | TTL-voltage compatible - accepts standard TTL logic levels (VIH ≥ 2.0V, VIL ≤ 0.8V) directly |
| ESD Protection | ±2000V HBM - exceeds MIL-STD-883, method 3015 for robust handling in assembly and field use |
| Operating Temperature | −55°C to +125°C - qualified for extended industrial and military-grade applications |
Pinout & Package
CD74ACT08M is housed in a 14-pin SOIC (D) package measuring 8.65mm × 6mm (body: 8.65mm × 3.91mm), with 1.27mm lead pitch and RoHS-compliant NiPdAu plating. It features gull-wing leads, Level-1 moisture sensitivity, and is optimized for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B | Input | Channel 1 AND gate inputs - require defined logic level (VCC or GND if unused) to avoid metastability |
| 1Y | Output | Channel 1 AND result - capable of sourcing/sinking ±24mA with VOH ≥ 3.7V / VOL ≤ 0.5V at 24mA |
| 2A, 2B, 2Y | Input/Output | Channel 2 independent AND function - electrically isolated from other gates, same drive specs |
| 3A, 3B, 3Y | Input/Output | Channel 3 independent AND function - shares VCC/GND rails but no internal coupling |
| 4A, 4B, 4Y | Input/Output | Channel 4 independent AND function - fully identical in timing and drive to channels 1–3 |
| GND (Pin 7) | Power Return | Common reference for all logic and output stages - must be low-impedance and decoupled near VCC |
| VCC (Pin 14) | Supply Rail | +5V power input - requires local 0.1μF ceramic bypass capacitor placed adjacent to pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Voltage Compatibility | Accepts standard TTL input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V) without external level shifters |
| Balanced Propagation Delays | tPLH and tPHL match within 0.1ns typical - eliminates skew-induced glitches in synchronous logic trees |
| Buffered Inputs | Reduces capacitive loading on upstream drivers and improves noise immunity on long traces |
| SCR-Latchup Resistance | Guaranteed immunity to latchup events under transient overvoltage or ESD stress per JEDEC JESD78 |
| Low Quiescent Current | ICC ≤ 80μA max at 85°C - minimizes static power in battery-backed or low-power standby systems |
Applications
| Industrial PLC I/O Conditioning | Digital Bus Signal Gating |
|---|---|
Use Scenario: Isolating and enabling discrete sensor signals before feeding into a microcontroller's GPIO port in a programmable logic controller. IC Role / Device Role / Timing Role: CD74ACT08M acts as a synchronous enable gate, combining status and enable bits to condition valid data windows. Use Value: Its ±24mA drive ensures clean signal edges across 20cm PCB traces, while −55°C to +125°C rating sustains operation in uncontrolled cabinet environments. |
Use Scenario: Controlling access to shared address/data buses between multiple peripheral controllers in an embedded instrumentation system. IC Role / Device Role / Timing Role: CD74ACT08M serves as a hardware-enabling gate for bus arbitration logic, synchronizing chip-select assertions with clock-domain boundaries. Use Value: Matched tPLH/tPHL delays prevent setup/hold violations during bus handoff, and TTL compatibility allows direct interface with legacy 74LS peripherals. |
| Motor Control Logic Sequencing | Test Equipment Digital Pattern Generation |
Use Scenario: Generating safe-start interlock conditions by ANDing emergency stop, thermal fault, and enable signals before releasing PWM gate drivers. IC Role / Device Role / Timing Role: CD74ACT08M provides fail-safe combinatorial logic with deterministic propagation - no internal state or clock dependency. Use Value: SCR-latchup resistance prevents catastrophic failure during motor back-EMF transients, and 2kV HBM withstand protects against operator ESD during maintenance. |
Use Scenario: Building custom digital stimulus waveforms in automated test equipment using discrete logic-based pattern sequencers. IC Role / Device Role / Timing Role: CD74ACT08M implements multi-stage AND trees to synthesize complex trigger conditions from counter outputs and external flags. Use Value: 3.3ns minimum propagation delay supports >30MHz pattern rates, and SOIC-14 footprint enables dense, repairable PCB layouts in modular test modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input AND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT08DR | Same logic function, identical SOIC-14 package, but rated only for −40°C to +85°C industrial range | Lacks extended temperature qualification - unsuitable for aerospace, downhole, or under-hood automotive use | Select SN74ACT08DR only when ambient operating temperature remains within −40°C to +85°C and full MIL-STD-883 ESD compliance is not required |
| 74VHC08M | Lower supply range (2V–5.5V), reduced drive (±8mA), higher propagation delay (5.5ns min), and no SCR-latchup hardening | Not suitable for high-noise industrial settings or direct 50Ω line driving; limited fanout capability | Choose 74VHC08M only for cost-sensitive, low-power, room-temperature consumer applications where robustness is secondary |
Compared with SN74ACT08DR and 74VHC08M, CD74ACT08M uniquely delivers extended temperature support (−55°C to +125°C), MIL-STD-883 ESD compliance, and ±24mA drive - making it the sole option among the three for mission-critical industrial and defense systems requiring guaranteed parametric performance across extreme conditions.
Availability
CD74ACT08M is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, motor control interlock logic, and digital bus signal gating requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74ACT08M includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability logic families.
CD74ACT08M belongs to TI's Advanced CMOS Technology (ACT) logic series, designed specifically for industrial, aerospace, and defense applications demanding wide temperature operation, high noise immunity, and robust ESD tolerance.
FAQ
What is the maximum operating temperature range for CD74ACT08M?
The CD74ACT08M is specified for continuous operation from −55°C to +125°C, validated per its Qualified Version definition as a catalog-grade part with extended temperature qualification. This range is confirmed in Section 4.3 Recommended Operating Conditions and the PACKAGE OPTION ADDENDUM, where CD74ACT08M is explicitly listed with Op temp (°C) = −55 to 125. It is not rated for the −40°C to +85°C range alone.
Does CD74ACT08M support 3.3V logic inputs?
No, CD74ACT08M does not guarantee correct operation with 3.3V logic inputs. Its VIH threshold is specified at 2.0V minimum only when VCC = 4.5–5.5V; at VCC = 5V, a 3.3V signal falls below the required VIH (2.0V is met, but noise margin is marginal), and the device lacks 3.3V-tolerant input circuitry. For mixed-voltage systems, level translation is required before applying 3.3V signals to CD74ACT08M inputs.
Can CD74ACT08M replace CD74HC08 in existing designs?
CD74ACT08M can replace CD74HC08 only if the design requires higher drive strength (±24mA vs. ±4mA), tighter propagation matching, or extended temperature support. However, CD74ACT08M draws higher quiescent current (up to 80μA vs. <1μA for HC) and has different input thresholds - direct substitution may cause increased power consumption or marginal logic-level compatibility. Review VIH/VIL and ICC specs before replacement.
What is the recommended bypass capacitor for CD74ACT08M?
A 0.1μF ceramic capacitor is recommended for CD74ACT08M, placed as close as possible to the VCC (Pin 14) and GND (Pin 7) pins. This value is explicitly stated in Section 7.1 Power Supply Recommendations and is critical for suppressing high-frequency supply noise generated during output transitions. Parallel use with a 1μF capacitor is acceptable to broaden noise rejection across frequency bands.
Is CD74ACT08M pin-compatible with CD74ACT08E?
Yes, CD74ACT08M is pin-compatible with CD74ACT08E - both implement identical logic functionality and share the same 14-pin dual-in-line pinout (1A, 1B, 1Y, ..., VCC, GND). The difference lies solely in packaging: CD74ACT08M uses SOIC (D), while CD74ACT08E uses PDIP (N). No PCB layout change is needed when migrating between them, though soldering processes and thermal management differ.
CD74ACT08M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- AND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 4 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 12.9ns @ 5V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
CD74ACT08M FAQ
1.How can I place an order for CD74ACT08M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT08M on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CD74ACT08M reliable?
The price and inventory of CD74ACT08M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT08M is usually 5 days.
3.What payment methods are accepted for CD74ACT08M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT08M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT08M?
CD74ACT08M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT08M order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CD74ACT08M?
For technical support, including CD74ACT08M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT08M requirements.
6.How does Aetrix verify that CD74ACT08M is sourced from the original manufacturer or authorized distributors?
All CD74ACT08M products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CD74ACT08M meets industry standards.
7.What is the process for return or replacement of CD74ACT08M?
All CD74ACT08M units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT08M, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CD74ACT08M part is unused and in its original packaging.
Return procedure for CD74ACT08M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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